Do you know what a voltaic battery is? You probably do! Voltaic batteries come in all shapes and sizes, turning chemical energy into the electrical energy we need to power our cell phones, iPods, tablets, cars… you name it! These batteries seem pretty complicated, but you can make a real voltaic battery right at home! Grab some vinegar, nails, copper wire, and an ice tray… you’re in for a lesson in circuits you’ll never forget.

It’s probably the world’s most baffling optical illusion. Hold one arc above the other and ask the question, “Which arc is bigger?” The bottom arc will always look bigger than the top one, yet they are actually the same size! Reverse the arcs to make the other one look bigger. What you see is not always what you get! Keep reading and we’ll let you in on some presentation ideas and stunts that will really amaze and fool your friends.

Graffiti Research Lab first introduced us to the awesome throwie idea, and we loved it. Ever since, we’ve been playing around with the idea of using light-emitting diodes (LED) and throwies as a great hands-on method to teaching science. You can do it, too, and we’ll show you how!